Pump for lubricators or the like



J. J. HENNESSY PUMP FOR LUBRICATOR$ OR THE LIKE Sept. 11, 1928.

Filed Oct. 17, 1923 L m 1 a at .21- i.? 24, 22.;

Patented Sept. 11, 19 28.

UNITED STATES 1,683,617 PATENT OFFICE.

JAMES J. HENNESSY, OF NEW YORK, N. Y.

- rm FOB LUBRICATOBS OR THE LIKE.

Application filed October 17, 1923. Serial in. 668,996.

present in railroad construction,fvaries in extent and consequently in the amount of lubricant supplied to' the journal. I have found it highly desirable to limit the amount of lubricant supplied to the journal and while the above mentioned-patents of mlne have disclosed means for adjusting the pump stroke or discharge, these adjustments must be made by one who installs or inspects the lubricators and often under conditions which render accurate adjustment difiicult or haphazard. In my improved construction herein disclosed the lubricator may be 1nstalled in anybox and will supply a constant amount of lubricant to the journal lrrespective of the exact form ofthejournal or move ment of the journal in the box In the accompanying drawlngs wh ch 11- lustrate a selected embodiment of 'my lnvention- Figure 1 is a vertical' longitudinal sectionthrough a lubricator containing my 1mproved ump and showlng the complete device app ii'ed to the journal of a wheeled axle.

Figures 2 and 3 are detail sections corresponding to the section shown in F gure 1 but showing the parts in difierent operating L0 position. The body 1 of the lubrlcator forms a lubricant reservoir 2 and isprovided with ends and sides 3 which extend upwardly to points adjacent the surface of the journal A to which the device is applied. These walls,

have shoulders 4 which seat a waste pan 5 which is movable vertically of the body and is yieldingly held against the ournal by means of a coiled spring 6 compressed beco tween the same and a suitable seat 7 upon the body. This construction does not depart from earlier disclosures of mine.

The lower ortion of body 1 includes an integral cylinder forming boss 8,- one end of so which is provided with an intake valve 9 com necting the cylinder interior with the lubricant reservoir 2. Slidable in cylinder8 is a bushing 10 and slidable in bushing '10 is a plston 11, one end of which projects from the .end of cylinder 8 opposite intake valve 9,.and is there connected by means of a bar 12 with a contact rod l3qslidable in the .end wall of the body and projecting outwardly through the latter into contact with the hub B or other vertical surface provided on journal A. Obviously movement to the right of the surface B Iongitudinally of the journal axis will move rod 13 inwardly, compressing aspring 14 seated in a suitable recess in the lubricator body and thereby moving piston ll to the right. Upon shifting of surface B to the left spring 14 will press rod 13 outwardly and this recipros cation of the rod and piston will produce a pumping action in cylinder 8. It will be noticed that the cylinder is provided with a dlscharge pamage 15 equippedwith a check valve 16 and'leading to a-telescoping tube 17 extending through the waste in pan' 5 to the surface of thejournalA.

Obviously if piston 11 was solid the amount of lubricant received through valve 9 and discharged through valve 1-6 would depend upon the movement of the piston which would vary due .to' the relative pla permitted between journal A and the lubncating device. To eliminate this variation in the operatlon of the pump I provide the bushing 10 in cylinder 8 and surrounding the forward portion of piston 11. Bushing 10 is provided with annular shoulders 19' at its ends and piston 11 is shaped so as to be engaged by these shoulders. The distance between shoulders 19 is about one-fourth inch greater than the length of the portion of piston 11 which engages the shoulder.'

Piston 11 is hollow through a portion'20 of its forward end and'is rovidedwith one or more lateral ports. 21. j ushing 10 is provided with an annular groove 22 and with one or more .lateral ports 23 leading from this groove and adapted to be aligned with piston port 21 when the piston engages the 'righthand shoulder 19 of thebushin The adjacent portion of thefinner wall 0 cylin-- der 8 is recessed as indicated at 24. This recess is of such areathat bushing port 23 'is always open to the same. One or more ports 25 connect cylinder recess 24 with the exterior of the cylinder.

Assuming the parts to be in the position shown in Figure 1, it will be seen that port 21 and groove 22 are disali ed and movement of the piston to the rig t will close intake valve 9 and, will compress the fluid in cylinder 8 lifting check valve 16' and force ing fluid through passage 15 until the inner end of the piston approaches righthand shoulder 19 of bushing 10, as indicated in Figure 2. At this point the piston and bushing ports will be aligned and the fluid in cylinder 8 may by pass into the reservoir t ough these ports and the recess 24 and ports 25 in cylinder 8. At the beginning of the return movement of the piston port 21 will leave groove 22 as shown in- Figure 3 thereby sealing the interior of the cylinder from its exterior and causing further movement to open intake valve 9 and rechar e the cylinder and hollow piston with lubricant. The amount of fluid supplied by the pump is limited by the area of the cylinder and piston interior and by the excess of the distance between shoulders 19 and the corresponding portion of the piston. These elements may be controlled by the manufacture of the devices and permlt the lubricator to be applied to any suitable journal without regard to adjustment of the operating mechanism or the giving of other consideration to the control of the suppl of lubricant.

Various modifi c zations of the details of my invention may be made without departing from the irit thereof as expressed in the appended c aims.

claim:

1. In a pump, a cylinder, intake and dischar e valves in said cylinder a bushing slidaile in said cylinder, and a plston having a limited sliding movement in said bushing, said cylinder, bushing, and piston having ports arranged so as to be disa igned during a predetermined movement only of sa1d piston to render the latter operat1ve and to be aligned during any remaining movement of said piston to provide a b -pass for the escape of fluid in said 0 lin er.

2. In a pum a cyhnder havin a valved intake, a disc arge passage le ing from said 0 linder, a reciprocating piston in said cylin er, a iston operating element adapted to be moved varying distances by an operating agency, a by-pass through said iston from the interior of said cylinder to t e exterior thereof, and means for closing said by-pass during a limited movement of said piston only.

3. In a pump, a cylinder, intake and dischar e valves in said cylinder, a bushing slida le in said cylinder, a piston having a limited sliding movement in said bushing, saidcylinder, bushing and iston having ports arranged so as to be disaligned during a predetermined movement only of said piston to render the latter operative and to be aligned during any remaining movement of said piston to provide a by-pass for the escape of fluid in said cylinder, and means a predetermined movement only of said piston in its discharge stroke and during substantially all of its intake stroke and to be aligned during the remainder of the piston discharge stroke to provide a by-pass for fluid tra ped in the cylinder thereby limiting the discharge of fluid by said pump during each stroke irrespective of the length of sa1d stroke.

5. In a pump, a cylinder, intake and discharge valves in said cylinder, a bushing slidable in said cylinder, a hollow iston shdable in said bushing, stops on said bushing limiting the movement of said piston therein, a lateral port in said (piston, a lateral port in said bushing adapte to align with said piston port only when said piston engages one of said stops, a port in said cylinder always in communication with said bushing port, and piston operating means having vanable movement.

6. In a pump, a cylinder, a dischar e assage, an inlet passa e, a piston in sai cy inder for forcing fluid through said passage, means having varying movement for 0 anting said piston, and means in said 0 der and surrounding said piston for limiting the discharge of sa1d piston to said passage.

' 7. In a pump, a linder provided with a port in its side inta e and discharge valves for said cylinder, a hollow piston in said cylinder provided with a port in its side, a movable member between said ports and having a port adapted to be aligned with said piston and cylinder orts or to be moved out of alignment therewith, and cooperating,

elements on said iston and member whereby movement of sai member is effected by said piston.

8. In a pump, a cylinder rovided with a port in its side, intake and 'scharge valves for said cylinder, a hollow piston in said cylinder provided with a port in its side, a movable member between said ports and having a port adapted to be aligned with said piston and cylinder ports or to be moved out of alignment therewith, and means for moving said member when said piston is moved beyond a predetermined extent.

9. In a pump, a cylinder, an inlet thereto, a discharge outlet therefrom, a piston in said cylinder adapted to be reciprocated between terminal points which may vary longitudinally of t e cylinder with successive strokes of said piston, and means operable by said pistonfor limiting the discharge of said piston throu h said outlet irrespective of the location 0 saidterminalpoints relative to 5 said discharge outlet.

10. 'In a pum a cylinder, an inlet thereto,

a discharge out et therefrom, a piston in said cylinder adapted to be reciprocated between terminal points which may vary longitudiw nally of the cylinder with successive strokes of said iston, and means operable by'said piston or limiting the discharge of said iston through said outlet irrespective of the ocation of said terminal points relative to said discharge outlet and irrespective of the 15 distance between said terminal points.

11. In combination, a pump cylinder, an inlet thereto, a discharge outlet therefrom, a piston, a reciprocating member, and means operable by said member for limiting the 2 discharge by said piston through said outlet irrespective of variations in the location of terminal points of the movement of said member on successive strokes thereof.

In testimony whereof I hereunto afiix my signature this 14th day of September, 1923.

JAMES J. HENNESSK 

